"President Obama said he will nominate the Environmental Protection Agency’s (EPA) acting deputy chief to take the position officially."

"Billionaire activist Tom Steyer won’t run for the U.S. Senate in 2016, saying Thursday he will instead concentrate on electing a Democratic president and in continued activism on his signature issue of climate change."

"The new, freewheeling Senate of Majority Leader Mitch McConnell presided over an agitated debate on the Keystone XL pipeline that churned into Friday’s wee hours and ended with aggrieved Democrats crying Koch."

"WINNIPEG, Manitoba — Hillary Rodham Clinton on Wednesday declined again to take a position on the Keystone XL pipeline, telling an audience in Canada that she would not express her views because of an ongoing review by the State Department."

"What's the best way to drill for oil in a mostly untouched Alaskan tundra, home to migrating caribou, abundant waterfowl, and Native Alaskan hunting and fishing grounds? It depends on which federal agency you ask."

"President Obama is tapping Brian Deese, the deputy director of his budget office, to replace veteran aide John Podesta when he departs the White House next month."

"Nearly 50 environmentalist organizations sent a letter Wednesday to every member of Congress, urging them to oppose granting President Barack Obama 'fast-track' authority to pass new free trade deals."

"It is nearly 27 years now since a NASA scientist testified before the US Senate that the agency was 99% certain that rising global temperatures were caused by the burning of fossil fuels. And the Senate still has not got it – based on the results of three symbolic climate change votes on Wednesday night."

"The Senate on Tuesday overwhelmingly approved an amendment to the Keystone XL pipeline bill that is aimed at improving energy efficiency in buildings — a rare moment of bipartisan agreement in a tense debate that is nowhere near being settled."

"The Canadian company that wants to build the Keystone XL pipeline took legal action Tuesday to secure remaining right of way from a group of holdout Nebraska landowners."